. >> reporter: the ntsb believes this device may make a difference. i passed. so that means the car would start? >> right. >> reporter: it's called an ignition interlock that keeps impaired drivers from starting their vehicles. if they've been drinking more alcohol than allowed by court -- >> most likely you'll get a fail. >> reporter: and then what? >> and then the car won't start. >> reporter: already required in 17 states, the ntsb now recommends all states require ignition interlocks for first-time offenders. >> if we can save ten lives, 100 lives, we will recommend what we think needs to be done to address impaired driving. >> reporter: the ntsb studied more than 1,500 wrong-way crashes over a five-year period. 60% of these accidents involved alcohol and many drivers had prior convictions for drunk driving. not everyone supports the recommendation. the american beverage institute points out that drunk driving fatalities are at historically low levels. that's little assurance for ginger's mother. >> the experience took away a beautiful daughter, a beautiful